95a2f54683
git-svn-id: https://svn.code.sf.net/p/apophysis7x/svn/trunk@1 a5d1c0f9-a0e9-45c6-87dd-9d276e40c949
74 lines
2.0 KiB
C
74 lines
2.0 KiB
C
/*
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Apophysis Plugin
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Copyright (C) 2007-2009 Joel Faber
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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// Must define this structure before we include apoplugin.h
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typedef struct
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{
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double curve_xamp;
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double curve_xlength;
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double curve_yamp;
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double curve_ylength;
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// precalc values:
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double pc_xamp;
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double pc_yamp;
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double pc_xlen;
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double pc_ylen;
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} Variables;
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#define _USE_MATH_DEFINES
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#include "apoplugin.h"
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// Set the name of this plugin
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APO_PLUGIN("curve");
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// Define the Variables
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APO_VARIABLES(
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VAR_REAL(curve_xamp, 0.0),
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VAR_REAL(curve_yamp, 0.0),
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VAR_REAL(curve_xlength, 1.0),
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VAR_REAL(curve_ylength, 1.0)
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);
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inline double fmax(double a, double b) {
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return a > b ? a : b;
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}
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// You must call the argument "vp".
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int PluginVarPrepare(Variation* vp)
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{
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VAR(pc_xamp) = VVAR * VAR(curve_xamp);
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VAR(pc_yamp) = VVAR * VAR(curve_yamp);
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VAR(pc_xlen) = 1.0 / fmax(VAR(curve_xlength) * VAR(curve_xlength), 1E-20);
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VAR(pc_ylen) = 1.0 / fmax(VAR(curve_ylength) * VAR(curve_ylength), 1E-20);
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return TRUE; // Always return TRUE.
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}
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// You must call the argument "vp".
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int PluginVarCalc(Variation* vp)
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{
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FPx += VVAR * FTx + VAR(pc_xamp) * exp(-FTy * FTy * VAR(pc_xlen));
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FPy += VVAR * FTy + VAR(pc_yamp) * exp(-FTx * FTx * VAR(pc_ylen));
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return TRUE;
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}
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